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Exhibit D <br /> Page 12 <br /> example,changing market conditions may result in an increase or a decrease from planned production objectives, <br /> which in turn may impact the overall acreage mined in a given year(versus planned)as well as the rate and/or <br /> direction of pit advance,etc.,hence a potentially corresponding effect may occur on subsequent mine blocks/years. <br /> To the extent any anticipated or proposed modification(s)are determined to be of a"significant"nature, CSC will <br /> accordingly introduce such via Technical Revision(where warranted)to secure DRMS authorization prior to <br /> proceeding with the change. However, it should be recognized that"operational flexibility"is one attribute that CSC <br /> has purposefully introduced by virtue of the general mine plan and the specific types of equipment proposed for the <br /> operation(i.e.,excavator and front-end loader with truck haulage). Thus,CSC may,at its discretion,take advantage <br /> of that operational flexibility with respect to pit configuration,general direction of advance, change in the locations <br /> of active mining face(s),the number of active mining faces,etc.while maintaining general conformance with the <br /> overall mine(and reclamation)plan,as described. <br /> 4.4 Pre-Production Site Development <br /> The first activity associated with mine site development will encompass the pre-stripping of those portions of the <br /> Permit Area dedicated to plant facilities and associated infrastructure(to include access and loadout roads,etc.), all <br /> of which are located in the central portion of Section 2,in addition to the Year 0 mine block to liberate sand <br /> resources for the initial ROM stockpile. This will be followed shortly thereafter by limited"mining"of Year 1 sand <br /> resources in order to simultaneously develop sufficient pit void to accommodate initial process discard disposal <br /> while establishing the initial ROM stockpile that will be utilized during process plant startup. <br /> Pre-stripping of the plant area will encompass the removal of the uppermost(nominal) 12-inches of"growth <br /> medium" for salvage, long-term storage/stabilization,and eventual re-use in site reclamation activities at the <br /> conclusion of LOM. This will be accomplished by dozer push and/or front-end loader/excavator loading and truck <br /> haul to the growth medium stockpile(TS-1). CSC notes that the "growth medium"material to be stored in the <br /> stockpile does not constitute"topsoil"per se,but rather,it is the topmost approximately 12-inches of material. The <br /> results of soils investigation efforts conducted to date indicate the presence of a nominal 8-inch(+/-)"root zone" <br /> within the uppermost 12-inch horizon. The vegetative community at the site is generally limited to that of various <br /> grasses, soapweed yucca,Russian thistle, and sand sagebrush, all of which are typical of the types of vegetation <br /> found regionally on similar,heavily-grazed,rangeland. <br /> In total,the plant area,which is comprised of the wet and dry plants and ancillary facilities, loadout and service <br /> road(s),and the ROM stockpile,will encompass on the order of 107 acres. Pre-strip of this area(to be accomplished <br /> prior to site grading and leveling)will require the initial stockpiling of approximately 173,000 cubic yards of growth <br /> medium. This material(along with incremental pre-strip volumes)will initially be stockpiled at a designated interim <br /> location on the Year 7 mine block(TS-0)proximal to and south of the plant area,to be either utilized in early-stage <br /> reclamation(see below)of disturbed areas or, if necessary,relocated to the long-term storage location(TS-1)within <br /> the Year 1 pit void. <br /> 4.5 Mining Sequence and Annual Production <br /> The CSC mine plan has been developed according to prudent mine engineering standards of practice and based on a <br /> number of operating design parameters. Many of these parameters have,been developed on the basis of identified <br /> site-specific limitations or constraints, including the presence of an extensive array of oil and gas infrastructure as <br /> Colorado Sand Company II, LLC <br /> Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application <br /> June 7,2024 <br />